I have , seven months after my radiation ended , my neck is stiff and has limited range of motion , and I cannot swallow , not even spit , whjich means I carry a cup all day in which to spit .
And yes there is pain and stiffness, and my head is starting to droop forward .
I am working with physical therapy a speech therapist .

Best of luck to you .

Forgot to mention I am NED from stage 4 upper esophageal cancer , due mostly I think to on - going keytruda treatments.